1443643345 has 8 divisors (see below), whose sum is σ = 1792109160. Its totient is φ = 1115089920.

The previous prime is 1443643339. The next prime is 1443643361. The reversal of 1443643345 is 5433463441.

It can be written as a sum of positive squares in 4 ways, for example, as 63297936 + 1380345409 = 7956^2 + 37153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1443643345 - 2¹³ = 1443635153 is a prime.

It is a super-2 number, since 2×1443643345² = 4168212215125578050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4977936 + ... + 4978225.

It is an arithmetic number, because the mean of its divisors is an integer number (224013645).

Almost surely, 2^1443643345 is an apocalyptic number.

It is an amenable number.

1443643345 is a deficient number, since it is larger than the sum of its proper divisors (348465815).

1443643345 is an equidigital number, since it uses as much as digits as its factorization.

1443643345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956195.

The product of its digits is 207360, while the sum is 37.

The square root of 1443643345 is about 37995.3068812452. The cubic root of 1443643345 is about 1130.1947989541.

The spelling of 1443643345 in words is "one billion, four hundred forty-three million, six hundred forty-three thousand, three hundred forty-five".